Remove 'Enable' button on unsupported platforms. Added 'No hosts' message.

remoting/remoting.gyp

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'variables': {
     # TODO(dmaclach): can we pick this up some other way? Right now it's
     # duplicated from chrome.gyp
     'chromium_code': 1,
     # Use consistent strings across all platforms. Note that the plugin name
@@ skipping 98 matching lines @@
         ],
       }, {  # else: branding!="Chrome"
         # Must match host/plugin/constants.h
         'host_plugin_name': 'Chromoting Host',
         'remoting_webapp_locale_files': [
           'webapp/_locales/en/messages.json',
         ],
       }],
     ],
     'remoting_webapp_files': [
+      'resources/chromoting16.png',
+      'resources/chromoting48.png',
+      'resources/chromoting128.png',
+      'resources/disclosure_arrow_down.png',
+      'resources/disclosure_arrow_right.png',
+      'resources/host_setup_instructions.png',
       'resources/icon_cross.png',
       'resources/icon_host.png',
       'resources/icon_pencil.png',
       'resources/icon_warning.png',
+      'resources/infographic_my_computers.png',
+      'resources/infographic_remote_assistance.png',
+      'resources/tick.png',
       'webapp/client_plugin.js',
       'webapp/client_plugin_async.js',
       'webapp/client_screen.js',
       'webapp/client_session.js',
       'webapp/clipboard.js',
       'webapp/connection_history.css',
       'webapp/connection_history.js',
       'webapp/connection_stats.css',
       'webapp/connection_stats.js',
       'webapp/cs_oauth2_trampoline.js',
@@ skipping 19 matching lines @@
       'webapp/scale-to-fit.png',
       'webapp/server_log_entry.js',
       'webapp/spinner.gif',
       'webapp/stats_accumulator.js',
       'webapp/toolbar.css',
       'webapp/toolbar.js',
       'webapp/ui_mode.js',
       'webapp/wcs.js',
       'webapp/wcs_loader.js',
       'webapp/xhr.js',
-      'resources/chromoting16.png',
-      'resources/chromoting48.png',
-      'resources/chromoting128.png',
-      'resources/disclosure_arrow_down.png',
-      'resources/disclosure_arrow_right.png',
-      'resources/infographic_my_computers.png',
-      'resources/infographic_remote_assistance.png',
-      'resources/tick.png',
     ],
     'remoting_host_installer_mac_roots': [
       'host/installer/mac/',
       '<(DEPTH)/chrome/installer/mac/',
     ],
     'remoting_host_installer_mac_files': [
       'host/installer/mac/do_signing.sh',
       'host/installer/mac/ChromotingHost.packproj',
       'host/installer/mac/ChromotingHostService.packproj',
       'host/installer/mac/ChromotingHostUninstaller.packproj',
@@ skipping 1589 matching lines @@
                   '../base/allocator/allocator.gyp:allocator',
                 ],
               },
             ],
           ],
         }],
       ],  # end of 'conditions'
     },  # end of target 'remoting_unittests'
   ],  # end of targets
 }